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	Southwest Research Institute offers the Mercedes-Benz M111 fuel economy test, which measures the effect of engine oil on the fuel economy of gasoline and light-duty diesel engine passenger cars.

Southwest Research Institute (SwRI) offers the Mercedes-Benz M111 fuel economy test, CED L-54-T-96, which measures the effect of engine oil on the fuel economy of gasoline and light-duty diesel engine passenger cars.

ACEA 2004 Specifications

The Mercedes-Benz M111 fuel economy test is part of ACEA 2004 Specifications:

Field Service Simulated

The CEC L-54-T-96 test is based on a European emissions test procedure performed on a chassis dynamometer.

CEC L-54-T-96 Test Fixture

An engine dynamometer test stand with a 2.0 liter Mercedes-Benz M111 E20, four-cylinder, sliding follower, overhead camshaft, port fuel-injected gasoline engine, with a "flying flush" system for changing oils without an engine shutdown is used for this test.

CEC L-54-T-96 Test Parameters

The 24-hour test includes running the test cycle with a baseline reference oil, performing a "flying flush" to candidate oil then running the test cycle three times on candidate oil. The portion of the test conducted on candidate oil incorporates steady-state aging of the oil charge. The test cycle has two parts and eight stages, varying speeds, loads and coolant and oil temperatures over a period of 2 hours, 24 minutes, 10 seconds. Fuel consumption is measured under cyclic conditions over the two-part cycle. The remainder of total test time consists of a stabilization period between test cycles and flushing between reference and candidate runs.

CEC L-54-T-96 Test Evaluations

Test results are expressed as a percent change in total fuel consumption of the candidate oil relative to the reference oil.

Used Engine Lubricant Analysis

None.
 

Pass/Fail Criteria

For more information about Mercedes-Benz M111 fuel economy evaluation capabilities at SwRI or how you can contract with SwRI, please contact Bill Buscher at wbuscher@swri.org or (210) 522-6802.

*Association des Constructeurs Européens d'Automobiles/European Automobile Manufacturers Association.

| Fuels and Lubricants Technology Department | Fuels and Lubricants Research Division | SwRI Home |

Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 11 technical divisions.

September 30, 2008